分离涡模拟在叶顶间隙流模拟中的可行性分析  

Feasibility Analysis of Detached Eddy Simulation in Tip Leakage Flow Simulation

作　　者：胡子龙 杨富超[2] 王晓航 吴延昭[1] 高洪军 朱迪 陶然[1,3] HU Zilong;YANG Fuchao;WANG Xiaohang;WU Yanzhao;GAO Hongjun;ZHU Di;TAO Ran(College of Water Resources and Civil Engineering,China Agricultural University,Beijing100083,China;China Water Resources Beifang Investigation Design and ResearchCompany Limited,Tianjin 300222,China;State Key Laboratory of Hydro-powerEquipment,Harbin 150040,China;Harbin Electric Machinery Company Limited,Habin 150040,China;Harbin Institute of Large Electrical Machinery,Harbin 150040,China;College of Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]中水北方勘测设计研究有限责任公司,天津300222 [3]水力发电设备国家重点实验室,哈尔滨150040 [4]哈尔滨电机厂有限责任公司,哈尔滨150040 [5]哈尔滨大电机研究所,哈尔滨150040 [6]中国农业大学工学院,北京100083

出　　处：《大电机技术》2022年第5期59-67,共9页Large Electric Machine and Hydraulic Turbine

基　　金：水力发电设备国家重点实验室开放课题(SKLHE-ORF-202102)。

摘　　要：为了找到一种经济、有效的湍流模型和网格方案用于模拟水翼叶顶间隙流的流动特征,本文以NACA0009水翼为研究对象,利用ICEM软件划分了三种六面体结构化网格方案,并运用SST k-ω、LES及DES三种湍流模型对水翼叶顶间隙流进行数值模拟,并对网格无关性和实验结果与模拟结果之间的差异进行分析。结果表明,DES湍流模型预测的叶顶泄漏涡(TLV)形态和速度与实验结果吻合较好,且其在M2、M3两种网格方案下模拟结果相似,验证了DES在叶顶间隙流模拟中的可行性。随后基于M2网格方案下DES湍流模型的计算结果对叶顶间隙流的特征进行分析,结果表明,叶顶泄漏涡在翼型前缘产生,在向下游的流动中,涡核内部压力、涡核心速度、湍动能均呈先上升后下降趋势。In order to find an economical and effective turbulence model and mesh scheme for simulating the flow characteristics of the hydrofoil tip leakage flow,this paper takes the NACA0009 hydrofoil as the research object,and uses ICEM software to divide three hex ahedral structured mesh schemes,and use three turbulence models SST k-ω,LES and DES to numerically simulate the leakage flow at the tip of the hydrofoil,and analyze the mesh independence and the difference between the experimental results and the simulation results.The results show that the shape and velocity of the tip leakage vortex(TLV)predicted by the DES turbulence model are in good agreement with the experimental results,and the simulation results under the M2 and M3 grid schemes are similar,which verifies the simulation of DES in the tip clearance flow is feasibility..Then,based on the calculation results of the DES turbulence model under the M2 grid scheme,the characteristics of the tip leakage flow are analyzed.The results show that the tip leakage vortex is generated at the leading edge of the hydrofoil.In the downstream flow,the internal pressure,velocity and turbulent kinetic energy of the vortex core all showe a trend of rising first and then falling.

关 键 词：湍流模型 叶顶间隙流 翼型 网格方案 

分 类 号：TK730.2[交通运输工程—轮机工程]